Design And Construction Of An Automatic Switch-Off Battery Charger
The design and construction of an automatic switch-off battery charger involve the development of a sophisticated charging system that seamlessly balances efficiency and safety. This intelligent charger is engineered to automatically cease the charging process once the battery reaches its optimum capacity, preventing overcharging and subsequent damage. The key components of this innovative device include a microcontroller, voltage and current sensors, and a relay system. The microcontroller acts as the brain, monitoring the battery’s voltage and current levels throughout the charging cycle. When the predefined charging threshold is attained, the microcontroller triggers the relay to disconnect the charger from the power source, ensuring the battery remains within the recommended parameters. This cutting-edge technology not only enhances the longevity of the battery but also mitigates the risks associated with overcharging, offering a reliable and efficient solution for powering various electronic devices.
This work is on an automatic switch-off battery charger based on a 555 timer IC. This smart charger automatically switches off when your rechargeable batteries reach the full charge. The circuit comprises a bistable multi-vibrator wired around timer IC 555. The bistable output is fed to an ammeter (via diode D1) and potmeter VR1 before it goes to three Ni-Cd batteries that are to be charged.
Thus when the batteries are fully charged to 3×1.2V=3.6V, a voltage higher than this makes transistor T1 to conduct. Transistor T2 also conducts and transistor T3 goes off. The threshold level of timer 555 reaches 6V, which is more than 2/3×VCC = 2/ 3×6=4V, to turn off the timer.
During charging, the threshold level of the timer is held low. The green LED (LED1) glows during charging of the batteries and goes off at the attainment of full charge. This circuit can be used only for 1.2V, 600mAH Ni-Cd rechargeable batteries that require 60 mA of current for 15 hours to charge fully.
TABLE OF CONTENTS
COVER PAGE
TITLE PAGE
APPROVAL PAGE
DEDICATION
ACKNOWELDGEMENT
ABSTRACT
CHAPTER ONE
1.0 INTRODUCTION
1.1 BACKGROUND OF THE PROJECT
- PURPOSE OF THE PROJECT
- AIM OF THE PROJECT
- OBJECTIVE OF THE PROJECT
- PURPOSE OF THE PROJECT
- LIMITATION OF THE PROJECT
- ADVANTAGES OF THE PROJECT
- PROBLEM OF THE PROJECT
- APPLICATION OF THE PROJECT
- RESEARCH QUESTION
- PROJECT ORGANISATION
CHAPTER TWO
LITERATURE REVIEW
- OVERVIEW OF THE STUDY
- REVIEW OF THE RELATED STUDY
CHAPTER THREE
3.0 CONSTRUCTION METHODOLOGY
3.1 BASIC OF THE SYSTEM
3.2 BLOCK DIAGRAM OF THE SYSTEM
3.3 SYSTEM OPERATION
3.4 CIRCUIT DIAGRAM
3.5 CIRCUIT DESCRIPTION
3.6 DESCRIPTION OF COMPONENTS USED
3.7 POWER SUPPLY UNIT
CHAPTER FOUR
4.0 TESTING AND RESULTS
- CONSTRUCTION PROCEDURE AND TESTING
- INSTALLATION OF THE COMPLET DESIGN
- ASSEMBLING OF SECTIONS
- TESTING OF SYSTEM OPERATION
- COST ANALYSIS
CHAPTER FIVE
- CONCLUSION
- RECOMMENDATION
- REFERENCES
KEYWORD: auto turn off battery charger circuit diagram, auto turn off battery charger mini project pdf, design and construction of battery charger pdf, auto turn off battery charger ppt, 12 volt battery charger with auto shut off, literature review of automatic battery charger, auto cut off charger, 12v 100ah battery charger circuit pdf
Automatic Switch-off Battery Charger
Circuit operation
Normally, the full charge potential of an Ni-Cd cell is 1.2V. Trigger the bistable by pressing switch S1 and adjust potmeter VR1 for 60mA current through the ammeter.
Advertisement
Now remove the ammeter and connect a jumper wire between its points ‘a’ and ‘b.’ Connect the positive output terminal of the batteries to the emitter of pnp transistor T1. The base of transistor T1 is held at 2.9V by adjusting potmeter VR2. The output of transistor T1 is inverted twice by npn transistors T2 and T3.
Thus when the batteries are fully charged to 3×1.2V=3.6V, a voltage higher than this makes transistor T1 to conduct. Transistor T2 also conducts and transistor T3 goes off. The threshold level of timer 555 reaches 6V, which is more than 2/3×VCC = 2/ 3×6=4V, to turn off the timer.
During charging, the threshold level of the timer is held low. The green LED (LED1) glows during charging of the batteries and goes off at the attainment of full charge.
Note that this circuit can be used only for 1.2V, 600mAH Ni-Cd rechargeable batteries that require 60 mA of current for 15 hours to charge fully.
SHARE PROJECT MATERIALS ON:
Author: See the writer of ‘Design And Construction Of An Automatic Switch-Off Battery Charger’ name on the first page of the downloaded file.
Acknowledgement: You must acknowledge and reference the writer of Design And Construction Of An Automatic Switch-Off Battery Charger on your acknowledgement and reference pages respectively.
Upload Similar: You can upload any content similar to Design And Construction Of An Automatic Switch-Off Battery Charger and get paid when someone downloaded the material.
Download: Click on “Donate & Download” under this Design And Construction Of An Automatic Switch-Off Battery Charger Title and you will be redirected to download page after the donation or chat with Us for alternative methods.
Content Size: Design And Construction Of An Automatic Switch-Off Battery Charger contains , and .